Sampler - Stable Diffusion

What are Diffusion Models?

1. DDPM: Denoising Diffusion Probabilistic Model
1. basic sampler -> Stable Diffusion's basic sampler 
2. 1000 steps 
2. DDIM: Denoising Diffusion Implicit Model
1. DDPM -> DDIM 
2. 10 ~ 50 steps 
3. Euler Discrete
1. Ordinary Differential Equation (OED) 
2. simple & fast 
3. same of DDIM or more steps
4. OLSS: Optimal Linear Subspace Search
1. fast, but using the old model 
2. 5 ~ 10 steps 
5. CM: Consistency Model
1. 1 step
2. pixel space
3. complex calculation
4. limited high resolution image 
6. LCM: Latent Consistency Model
1. 1 ~ 4 steps 
2. latent space
3. low dimension calculation
4. support high resolution image 
5. need LoRA or need re-training model (cannot use old model)